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ePaper created 2017-12-06, 11:14:19 | version 1.38.0
industry | Figs. 12a–d: Manufacturing and attachment of a screw-retained, temporary crown. Fig. 13: Closed tray impression was made and preparation of tooth #12, 11 and 22 for metal-free ceramic restorations. Fig. 14: At the try-in appointment the clinician was unable to attach the custom-made abutment. Fig. 15: Design of a standard NucleOSS Ti-Base abutment. Fig. 16: The red-dotted lines demonstrating why the standard Ti-Base abutment was not able to meet the angle for the required fitting accuracy. Fig. 17: Comparison of the new and old design of both Ti-Base abutments. implants 3 2017 25 Fig. 12a Fig. 12b Fig. 12c Fig. 12d and the impression was made (Figs. 11a & b). A screw-retained, temporary crown was manufactured and attached to the implant in order to achieve a better soft-tissue contour (Figs. 12a–d). Following the final gum-tissue conditioning, a closed tray impression was made. However, due to the aesthetic demands of the patient, teeth #12, 11 and 22 were also prepared for metal-free ceramic resto- rations (Fig. 13) and the impression was taken. A custom-milled Zr abutment on a Ti-Base was or- dered for the implant-retained restoration. Other teeth would receive a metal-free ceramic restoration. At the try-in appointment, however, the clini- cian was unable to attach the custom-made abut- ment. The periapical radiography revealed the reason (Fig. 14). The implant was intentionally positioned deep in the coronoapical direction to avoid any aes- thetic problems. However, Ti-Base custom abutments of nearly all companies have a shoulder design, on which the custom-made Zr should stand. Ti-Base design is mainly used in aesthetic regions so it is very understandable that all designs intend to position the shoulder at the deepest level of the Ti-Base abut- ment. The design of a standard NucleOSS Ti-Base abutment is very similar to other companies’ prod- ucts. Its design can be seen in Figure 15. The bone surrounding the implant did not allow the standard Ti-Base abutment to fit on the implant. This Fig. 13 Fig. 14 Fig. 15 Fig. 16 Fig. 17